Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after rc5

Cross-merge BPF and other fixes after downstream PR.

No conflicts.

Adjacent:
Auto-merging MAINTAINERS
Auto-merging Makefile
Auto-merging kernel/bpf/verifier.c
Auto-merging kernel/sched/ext.c
Auto-merging mm/memcontrol.c

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

4 files changed, 20 insertions, 8 deletions

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 3ec2033c0774..ef2d5dca6f70 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -4518,8 +4518,11 @@ static int t_show(struct seq_file *m, void *v)
 			unsigned long direct;
 
 			direct = ftrace_find_rec_direct(rec->ip);
-			if (direct)
-				seq_printf(m, "\n\tdirect-->%pS", (void *)direct);
+			if (direct) {
+				seq_printf(m, "\n\tdirect%s-->%pS",
+					   ftrace_is_jmp(direct) ? "(jmp)" : "",
+					   (void *)ftrace_jmp_get(direct));
+			}
 		}
 	}
 
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 41c9f5d079be..630221b00838 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -3137,6 +3137,8 @@ int ring_buffer_resize(struct trace_buffer *buffer, unsigned long size,
 					list) {
 			list_del_init(&bpage->list);
 			free_buffer_page(bpage);
+
+			cond_resched();
 		}
 	}
  out_err_unlock:
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index e575956ef9b5..baec63134ab6 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -138,7 +138,7 @@ cpumask_var_t __read_mostly	tracing_buffer_mask;
  * by commas.
  */
 /* Set to string format zero to disable by default */
-char ftrace_dump_on_oops[MAX_TRACER_SIZE] = "0";
+static char ftrace_dump_on_oops[MAX_TRACER_SIZE] = "0";
 
 /* When set, tracing will stop when a WARN*() is hit */
 static int __disable_trace_on_warning;
@@ -3012,6 +3012,11 @@ static void __ftrace_trace_stack(struct trace_array *tr,
 	struct ftrace_stack *fstack;
 	struct stack_entry *entry;
 	int stackidx;
+	int bit;
+
+	bit = trace_test_and_set_recursion(_THIS_IP_, _RET_IP_, TRACE_EVENT_START);
+	if (bit < 0)
+		return;
 
 	/*
 	 * Add one, for this function and the call to save_stack_trace()
@@ -3080,6 +3085,7 @@ static void __ftrace_trace_stack(struct trace_array *tr,
 	/* Again, don't let gcc optimize things here */
 	barrier();
 	__this_cpu_dec(ftrace_stack_reserve);
+	trace_clear_recursion(bit);
 }
 
 static inline void ftrace_trace_stack(struct trace_array *tr,
@@ -10507,7 +10513,7 @@ static int __remove_instance(struct trace_array *tr)
 
 	/* Disable all the flags that were enabled coming in */
 	for (i = 0; i < TRACE_FLAGS_MAX_SIZE; i++) {
-		if ((1 << i) & ZEROED_TRACE_FLAGS)
+		if ((1ULL << i) & ZEROED_TRACE_FLAGS)
 			set_tracer_flag(tr, 1ULL << i, 0);
 	}
 
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index b16a5a158040..137b4d9bb116 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -700,6 +700,8 @@ int trace_event_reg(struct trace_event_call *call,
 
 #ifdef CONFIG_PERF_EVENTS
 	case TRACE_REG_PERF_REGISTER:
+		if (!call->class->perf_probe)
+			return -ENODEV;
 		return tracepoint_probe_register(call->tp,
 						 call->class->perf_probe,
 						 call);
@@ -824,16 +826,15 @@ static int __ftrace_event_enable_disable(struct trace_event_file *file,
 		 * When soft_disable is set and enable is set, we want to
 		 * register the tracepoint for the event, but leave the event
 		 * as is. That means, if the event was already enabled, we do
-		 * nothing (but set soft_mode). If the event is disabled, we
-		 * set SOFT_DISABLED before enabling the event tracepoint, so
-		 * it still seems to be disabled.
+		 * nothing. If the event is disabled, we set SOFT_DISABLED
+		 * before enabling the event tracepoint, so it still seems
+		 * to be disabled.
 		 */
 		if (!soft_disable)
 			clear_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &file->flags);
 		else {
 			if (atomic_inc_return(&file->sm_ref) > 1)
 				break;
-			soft_mode = true;
 			/* Enable use of trace_buffered_event */
 			trace_buffered_event_enable();
 		}